Termite treatments are generally ineffective in which of the following construction types?

Termite treatments are typically less effective in concrete block foundations due to the nature of how concrete block is constructed and how termites may behave in relation to such materials. Concrete blocks can provide hidden pathways for termites, especially if they contain voids or if there are cracks that extend into the foundation. This construction type also often requires specific treatment methods, such as targeting the soil underneath and around the foundation, to ensure thorough coverage and prevent potential infestation.

In contrast, wood foundations are inherently susceptible to termite damage due to the presence of cellulose materials, making treatments directly effective. Steel frame buildings do not provide a food source for termites, thereby reducing the likelihood of infestation, and brick structures, while they can have vulnerabilities around structural elements, typically can be treated effectively at the foundation level.